•8 Announcement, 



March 24, '91— 



On van't Hofif's Law of Osmotic Pressure. (Published in 

 the Chemicl A^ews April 10, '91). D. J. Carnegie. 



The Aryan Question. Dr. Sylvester Primer. 

 April 21, '91— 



An Interpretation of the Fourth Gospel in the Light of 

 Gnostic Philosophy. President William F. Slocum. 



The Elliptic Functions Defined Independently of the Cal- 

 culus. F. H. Loud. 



The Study of Diophantine Analysis in the United States. 

 F. Cajori. 

 May 12, '91— 



Cross Katio. B. E. Carter, Jr. 



Calibration of Burettes. D. J. Carnegie. 

 June 9, '91— 



On a Passage in the Frogs. Dr. H. W. Magoun. 



Note on the Hadley- Allen Grammar. Dr. H. W. Magoun. 



Historical Note on the Differentiation of a Logarithm. F. 

 Cajori. 



A Mathematical Error in the Century Dictionary. F. 

 Cajori. 



